Tools
The numbers.
Free calculators built on Course DNA. Pick a race, run the math, take the read back to training.
Calculators
Race Time Predictor
Finish time
Index, distance, gain, last year's winner. Optimistic, realistic, conservative.
Course Readiness Score
Training read
Weekly miles, vert, kit, and the work this course asks. A score against Course DNA.
GAP Calculator
Grade-adjusted pace
Minetti model. Flat-equivalent effort on any slope.
Pace Converter
Units
min/km, min/mi, km/h, mph. Splits to 100K.
Incline Calculator
Grade & effort
Energy cost and flat-equivalent pace for any gradient.
Race tools
Race Effort Estimator
km-effort
ITRA effort, unofficial index, UTMB stone tier from any finish.
Nutrition Calculator
Fueling
Calories, carbs, fluid, sodium per hour for your race.
Drink Mix Builder
DIY mix
Osmolality, carb ratio, brand presets for your bottle.
Aid Station Planner
Checkpoints
Arrival times by km-effort. Cutoff margins and hiking flags.
Race Conditions Simulator
Environment
Heat, altitude, and night penalties on your base finish time.
GPX Explorer
Course map
Upload GPX. Branded map, elevation profile, gradient heatmap.